Astronomers claim to discover biggest supermassive black hole yet
Click for original image.
The uncertainty of science: Astronomers now believe they have discovered the heaviest supermassive black hole yet found, with a mass thought to be equivalent to 36 billion solar masses and located at the center of a distant galaxy they have dubbed The Cosmic Horseshoe.
The picture to the right, cropped, reduced, and sharpened to post here, was taken by the Hubble Space Telescope. You can read the science paper here.
Researchers detected the Cosmic Horseshoe black hole using a combination of gravitational lensing and stellar kinematics (the study of the motion of stars within galaxies and the speed and way they move around black holes). The latter is seen as the gold standard for measuring black hole masses, but doesn’t really work outside of the very nearby universe because galaxies appear too small on the sky to resolve the region where a supermassive or ultramassive black hole lies.
Adding in gravitational lensing helped the team “push much further out into the universe”, Professor Collett said.
There is a blue-colored galaxy directly behind the Horseshoe, whose light is lensed into the blue circle as it passes through the black hole’s massive gravitational field.
It is believed, based on present theories, that this black hole is at the uppermost limit possible in mass. It also must be underlined that there are many uncertainties in this data.
On Christmas Eve 1968 three Americans became the first humans to visit another world. What they did to celebrate was unexpected and profound, and will be remembered throughout all human history. Genesis: the Story of Apollo 8, Robert Zimmerman's classic history of humanity's first journey to another world, tells that story, and it is now available as both an ebook and an audiobook, both with a foreword by Valerie Anders and a new introduction by Robert Zimmerman.
The print edition can be purchased at Amazon or from any other book seller. If you want an autographed copy the price is $60 for the hardback and $45 for the paperback, plus $8 shipping for each. Go here for purchasing details. The ebook is available everywhere for $5.99 (before discount) at amazon, or direct from my ebook publisher, ebookit. If you buy it from ebookit you don't support the big tech companies and the author gets a bigger cut much sooner.
The audiobook is also available at all these vendors, and is also free with a 30-day trial membership to Audible.
"Not simply about one mission, [Genesis] is also the history of America's quest for the moon... Zimmerman has done a masterful job of tying disparate events together into a solid account of one of America's greatest human triumphs."--San Antonio Express-News
Click for original image.
The uncertainty of science: Astronomers now believe they have discovered the heaviest supermassive black hole yet found, with a mass thought to be equivalent to 36 billion solar masses and located at the center of a distant galaxy they have dubbed The Cosmic Horseshoe.
The picture to the right, cropped, reduced, and sharpened to post here, was taken by the Hubble Space Telescope. You can read the science paper here.
Researchers detected the Cosmic Horseshoe black hole using a combination of gravitational lensing and stellar kinematics (the study of the motion of stars within galaxies and the speed and way they move around black holes). The latter is seen as the gold standard for measuring black hole masses, but doesn’t really work outside of the very nearby universe because galaxies appear too small on the sky to resolve the region where a supermassive or ultramassive black hole lies.
Adding in gravitational lensing helped the team “push much further out into the universe”, Professor Collett said.
There is a blue-colored galaxy directly behind the Horseshoe, whose light is lensed into the blue circle as it passes through the black hole’s massive gravitational field.
It is believed, based on present theories, that this black hole is at the uppermost limit possible in mass. It also must be underlined that there are many uncertainties in this data.
On Christmas Eve 1968 three Americans became the first humans to visit another world. What they did to celebrate was unexpected and profound, and will be remembered throughout all human history. Genesis: the Story of Apollo 8, Robert Zimmerman's classic history of humanity's first journey to another world, tells that story, and it is now available as both an ebook and an audiobook, both with a foreword by Valerie Anders and a new introduction by Robert Zimmerman.
The print edition can be purchased at Amazon or from any other book seller. If you want an autographed copy the price is $60 for the hardback and $45 for the paperback, plus $8 shipping for each. Go here for purchasing details. The ebook is available everywhere for $5.99 (before discount) at amazon, or direct from my ebook publisher, ebookit. If you buy it from ebookit you don't support the big tech companies and the author gets a bigger cut much sooner.
The audiobook is also available at all these vendors, and is also free with a 30-day trial membership to Audible.
"Not simply about one mission, [Genesis] is also the history of America's quest for the moon... Zimmerman has done a masterful job of tying disparate events together into a solid account of one of America's greatest human triumphs."--San Antonio Express-News
I wonder if the density of a black hole increases with its size.
Grok says no. It says density actually decreases with increase in solar mass size:
“… As the solar mass of a black hole increases, its density decreases because the volume within the event horizon grows with the cube of the mass, while the mass itself grows linearly. A supermassive black hole is far less dense than a stellar-mass one. …”